影像来源与版权:Image Data: NASA, ESA, Hubble Legacy Archive; Rogelio Bernal Andreo (DeepSkyColors.com)

说明:这个引人注目的旋涡星系M104以接近侧向轮廓、一道广阔的环状模糊尘埃带而著名。在大量恒星形成的中央凸起衬托下,这条宇宙尘埃带使星系看起来好像一顶宽边帽,因而人们赋予它草帽星系的昵称。哈勃太空望远镜的数据被用来制作这幅著名星系的清晰影像。这幅经过处理的影像呈现了星系自然的颜色外观,保存了常常被M104明亮中央凸起发出的耀眼光芒所掩盖的细致结构,这也是较小地面望远镜观测时总是观测不到的。草帽星系也被称为NGC 4594,在各个波段均可见,其中央拥有一个超大质量黑洞。M104的大小约5万光年,距离我们2800万光年远,是室女座星系团南缘最大的星系之一。

M104: The Sombrero Galaxy
Image Data: NASA, ESA, Hubble Legacy Archive
Processing & Copyright: Rogelio Bernal Andreo (DeepSkyColors.com)

Explanation: The striking spiral galaxy M104 is famous for its nearly edge-on profile featuring a broad ring of obscuring dust lanes. Seen in silhouette against an extensive central bulge of stars, the swath of cosmic dust lends a broad brimmed hat-like appearance to the galaxy suggesting a more popular moniker, The Sombrero Galaxy. Hubble Space Telescope data have been used to create this sharp view of the well-known galaxy. The processing results in a natural color appearance and preserves details often lost in overwhelming glare of M104’s bright central bulge when viewed with smaller ground-based telescopes. Also known as NGC 4594, the Sombrero galaxy can be seen across the spectrum and is host to a central supermassive black hole. About 50,000 light-years across and 28 million light-years away, M104 is one of the largest galaxies at the southern edge of the Virgo Galaxy Cluster.
Astronomy Picture of the Day 03/29/2019